Improvement in clamps for butter-firkins



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D. MLLOCKRIDGE, OF OTTO, N'EW YORK.l

Letters Patent No. 96,451, dated lilo/umher 2, 1869.

IMPROVEMENT IN CLAMPS FOR BUTTER-FIRKINS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.:

-Be it `known that I, D. M. LooKRIoen, of Otto, in the county oi' Cattaraugus, and State ol New York, have invented a new and useful Improvement in Fir kins and Tubs for Butter and other substances; and I do hereby declare that the following is a full, clear,

and exact description thereof, which will enable thosel My invention consists in providing one or more v hoh-s through the iirkin or tub, lneferably at the head, for the insertion ol' the ihspeetorstrier, and in hermetically closing them diy a button or clamp, provided with India rubber, or other suitable packing-substanee, clamped down upon the said opening by a screw, which may he started ont a few turns when access is desired,

so that the clamp may be turned away from over the holes.

4 Figure 1 represents a plan view of a vessel for packing butter, lard, orother like substance, provided with my improvements; and

Figure 2 represents a sectional elevationof the same.

Similar letters of reference indicate corresponding parts.

A represents the head, which I provide with one or l more inspection-holes, B.

C represents a clamp or button, having In'iia-rubber or other suitable exible packing-disks, D, suitably inserted in `its lower face, to fit down upon the head above and around the holes, and having a central clamping-screw, E, for screwing into the head and clamping the packing-disks down, so as to pack the holes permanently against the admission of air, and to prevent the escape of brine, while in transita or storage.

For inspection, these clamps may be readily removed by starting the screws and turning the clamps thereon; and they are as readilymade tight again after inspection, without any damage to the tub or.

loss of brine, which is very damaging to butter, and

`which invariably results when the heads are taken out,

and which is very liable to occur when holes are bored `and plugged, as the plugs work .loose veryfrequently. Having thus described'my invention, `Wl1at I claim as new, and desire to secure by Let-I.A ters Patent, is'- A screw-clamp, C, with packing-block or blocks D, for closing the inspection-hole or holes B, substantially' as herein shown and described,

The above specification of my invention signed by me, this 17th day of' July, 1869.

. D. M. LOOK-RIDGE.

Witnesses: v

'RALPH DEWEY, 'ELIsHA DARE. 

